Here is an article written by a friend and fine young apologist named William Albrect. It was inspired by a question he received:

Hello Mr. Albrecht. A certain Joe Mizzi claims that there is no warrant for a priesthood in the New Testament. Here are the comments he makes in contention to this. This is really challenging my faith. I was wondering if you could respond to this.”

You can read the response here. For another great article on the same topic on the EWTN website, click here.